How many times can I extend my 30-day exemption stamp for staying in Thailand?

After entering Thailand on a 30-day exemption stamp, you can extend your stay for another 30 days once. To stay longer, you'll need to leave the country and re-enter. Depending on your passport's country of origin, you can do this twice a year for a new visa exemption if you re-enter by land, but it's unlimited if re-entering by air. Alternatively, consider applying for a visa at a Thai consulate or embassy.